Machine for casting boxes and other hollow metal articles



' 1,633,088 June 1927' J. A. FULLILOVE MACHINE FOR CASTING BOXES ANDOTHER HOLLOW METAL ARTICLES 3 Sheets-Sheetl Filed Ana. 1, 1925 June 211927. A 1,633,088

J. A. FULLJLOVE MACHINE FOR CASTING BOXES AND OTHER HOLLOW METALARTICLES Filed Aug. 1, 1925 5 Shegts-Sheet 2 k 1,633,088 June 21 1927'J. A. FULLILOVE momma FOR CASTING a oooo AND 0mm HOLLOW METAL ARTICLESFiled Ana. 1, 1925 s Sheets-Sheet 3 i v N Til Patented 21, 1927.

units stares g re at as PATE T Q iCE-v ,sonn ALFRED FULLILOVE, or.MARKET namaonouen, ENGLAND.

Macrame non CASTING noxns AND omnnn HOLLOWJMETAL ARTICLES.

Application filed August 1, 1925, Serial No. 17,503, 'and' in GreatBritain August 6, 1924.

-Tl1is invention relates to a machine for would be useful containers foraccumu- I Y lator plates as well as tor other purposes arises from thefact that the walls of said boxes are necessarily thin and in order toobtain sufliciently homogeneous castings the metal must berapidlydistributed throughout the mould in. a fluid state and then causedtocool rapidly in the mould.

f In addition themould must be of such a construction as to permit ofits being readily opened to enable the cast-article to be withdrawn. w a

In order to eliect the desired objects I provide a mould consisting'ottwo separable water cooled parts and a w-ithdrawable water cooledcentral core and I provide -means for injecting the metal into the mouldsuddenly under pressure.

In the accompanying drawings lustrated more or less diagrammatically ameans for accomp'lishing the objects of my invention.

Innthese drawings Fig, 1 is a plan view of: a mould for castingrectangular boxes,

Fig. 2 is an end elevation thereof, Fig; 3 is a-sideelevation thereof,and

Fig. lis a diagrammatic side view ot the complete apparatus.

Referring tothese draw-ings the numeral 1 designates the mould bed-platewhich has a mould core 2 mounted to slide in 'thedirection-of the arrow;A; This mould. core .is also capable of swivellmg onthe pivot 3 when thecore 1s in its withdrawn position shown in Fig. 1. 'The mould isconstructed in two similar parts l and 4e which-are slidable upon thebed 1 in directions at right angles to the arrow A. The bedplate 1 isprovided with a nozzle orifice-5 which is 7 connected with a supply ofmolten metal Lil . .which is delivered to it under pressure as willhereaftenappear. The mould and its core are so arranged that a verticalplane passing throi-ig'h the orifice 5 wi'llbisect the angle formed bythe adjacent walls of the box so that there will be an equal tendencyfor the metal to flow in both directions. This is an importantconsideration in practice.

Both the mould parts 4: and '4 and the mould core 2 are water cooled andin-so far as these mould parts and core are movable I have ilitisnecessary to provide a system of flexible pipes, the general system ofwhich will be understood from Fig. 4. Uponreferring to this figure itwill be seen that cooling water from asuitable source of supply passesby way of the pipes 6, 7 8 and 9to the mould core 2, which is hollow,flexible connections such as short lengthslof rigid pipes connect- Tothe by way'ot the pipes 6, 13, 14c and 15, the jomtsat- 1 1 and lo'being flexible and after circulating through the mould jackets thewaterpa'sses out to the outlet pipe 12-by way of the pipes 16, 17 and 18provided with flexible joints 16 and 17 as before. A-sui'table valve,such as 19, may be provided to regulate the water supply.

ThenumeralJ2O designates an air vessel charged to a suitable pressure bymeans of the pump or compressor 21, a gauge 22 being "providedtoindicate" the pressure in the [container or vessel 20. Compressedair,

trom thisvessel passes to the metal pot or container 23 byway of thepipeline 24 in which a stop valve 25 and a two-way cook 26 is provided.Apipe or conduit 27 de-' pends from] the metal orifice or nozzle 5 someway beneath the surface oft-he. metal 1n the metal pot or container 23so as to ensure that themetal will be taken from be neatlrthe surfaceupon which dross and impurities' are liable to float.

' Theope'ration of the machine is asv tollows z-The mould core 2 isarranged rough- -1y 1n P03113101} by being pushed in by hand for thegreater part of its travel and then finally screwed home by meansot'the' screw 28 formed on the rod 28which engages a thread in the fixedmember29. l -he mould parts ,4, and 4 are thensimilarly closed on tothecore, the parts being first pushed tothe parts are adjusted to operateon casting position there will be a space between the mould parts andthe core equal to the thickv gether arrjdthen finally tightened oneagainst Y the other bymeans of the screws (BO-formed ness of the box tobe cast. The two-way cook 26 is adjusted to its position for de liveringair under pressure to the metal pot or container and the valve 25 isopened. By this means metal under pressure of the compressed air isforced through the orifice into the mould.

The two-way cock 26 is then moved into its second position where thecompressed air passes to atmosphere and the pressure on the metal isinstantly relieved and the valve is again closed. The metal has now beenforced completely through the mould, driving out any air through openins or air vents and 33 in the upper part oi? the mold provided for thepurpose and by reason of the cooled mould the casting immediately sets.The mould parts i and at are now separated by first operating the screwsand then simply pulling the mould parts away and similarly the mouldcore 2 withdrawn by first operating the screws 28 and then pulling thecore out until its inner end is clear of obstruction when the core canbe turned bodily about its pivot 3. The cast box which is on the corecan then be removed and will be found to be a sound homogeneous casting.

It will be found that when the core is just shifted it can be withdrawneasily particularly if the mould parts and core are given a slightlytapering form.

After the mould has been opened and the core withdrawn in the mannerbefore described the cast box attached to a tang or 7 breakcorresponding to the inlet orifice will remain and can quite easily bedetached and finished off by the removal of the tang or break and theprojections which have been formed by the passage of metal through theair escape outlets.

it will be seen from the foregoing that the essential conditions to beobserved are the provision of comparatively cold mould parts and thesudden injection of the hot molten metal under such pressure in such away as will cause it to flow rapidly and evenly throughout the mould andthen solidify rapidly immediately the metal supply is cut off.

hat I claim and desire to secure by Letters Patent is 1. A machine forcasting boxes and like hollow articles comprising a Withdrawable watercooled mould core, separable water cooled mould parts adapted to beclosed upon and to position the core automatically, a reservoir formolten metal under releasable pressure, means for injecting the metalinto the mould under sudden pressure in the direction of airvents oroutlets in the mould,

and means for releasing the pressure substantially as specified.

2. A machine for casting boxes or like hollow articles according toclaim 1 wherein the mould is so arranged and the metal injection nozzleso positioned that the tendency of the flow of the metal into the mouldis substantially equal on both sides of a plane normal to the nozzle.

3. A machine for casting boxes and like hollow articles comprising aWithdrawable water cooled mould core, separable water cooled mould partsadapted to be closed upon and to position the core automatically, areservoir for molten metal under releasable pressure means including anozzle for injectin the metal into the mould under sudden pressure inthe direction of air vents or outlets in the mould, and means forreleasing the pressure, said nozzle being located at one of the edges ofthe box adjacent a corner and said mould being so constructed that avertical plane passing through the nozzle bisects the angle between theadjacent sides of the box whereby the tendency to flow of the metal isequal on both sides of said plane. 7

4. A machine for casting boxes and other hollow metal articlescomprising essentially a water cooled core and mould parts and means forsupplying molten metal under controlled air pressure.

5. A machine for casting boxes and other hollow metal articles,comprising two mould parts mounted on guides so as to be movable to andfrom each other, and a movable mould core mounted on guides so as to bemovable to and from the mould parts, said mould parts and said corehaving cooling water receptacles and a water circulating systemconsisting of rigid pipes communieating with said water receptacles andflexibly connected to accommodate the movement of the mould parts.

6. A machine for casting boxes and other hollow articles in accordancewith claim 5, wherein the movable mould core is mount-ed on a pivot soas to be capable of both a sliding and pivotal movement in the sameplane.

In Witness whereof I affix my signature.

JOHN ALFRED FULLILOVE.

